Robert Downey Jr. Tells Letterman Why He Was Detained in Japan (VIDEO)

Robert Downey Jr. explained to David Letterman why he was detained in Japan for six hours while promoting 'Iron Man,' and, he took an opportunity to poke fun at Letterman for his own recent headline-making scandal on last night's 'Late Show with David Letterman.'

"I ran into a bit of trouble in Japan. I was detained. I think it had something to do with my fairly distant past," Downey Jr. said, referring to his brushes with the law and well-documented battle with substance abuse. "Not recent stuff like you or Tiger."

Watch the video after the jump.Robert Downey Jr. explained to David Letterman why he was detained in Japan for six hours while promoting 'Iron Man,' and, he took an opportunity to poke fun at Letterman for his own recent headline-making scandal on last night's 'Late Show with David Letterman.'

"I ran into a bit of trouble in Japan. I was detained. I think it had something to do with my fairly distant past," Downey Jr. said, referring to his brushes with the law and well-documented battle with substance abuse. "Not recent stuff like you or Tiger."

Watch the video from TV's Top 5! below.

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